Manufacture of brake shoes and the like



0a. 1, 1935. A. ROSNER v 2,o1s;763

SHOES AND THE L Original Filed April 21, 1950 2 Sheets-Sheet 1 4 FIG./

. IN VEN TOR.

ADOLPH ROSNER ORNEY 0t.1,1935. A, R$NER 2,015,763

7 ES AND THE L Original Fild April 21, 1930 2 Sheets-Sheet 2 IN V ENTOR.

' ADOLPH RosNER JAT.

v ATTORNEY Patented Oct. 1, '1935 UNITED STATES-'- PATENT (OFFICE,MANUFACTURE OF BRAKE SHOES AND THE LIKE Adolph Rosner, Rockton, Ill.,assignor, by mesne assignments, to Bendix Brake Company, South Bend,Ind., a corporation of Illinois ..0riginal application April 21, 1930,Serial No.

445,870. Divided and this application September 20, 1932, Serial No.634,040

2 Claims. (Cl. 29-1521) that strip steel, which is cheaper than sheetsteel of the same weight, may be used both for the web and the rim ofthe shoe.

Preferably I stamp a straight, flat web blank from the strip steel orother material, provide it with suitable end fittings andwith-anydesired openings and the like, and then stamp in it a V series ofparallel transverse corrugations. The

web blank so formed is then bent into an arc in the plane of theoriginal material, i. e. widthwise of the blank, and a curved rim blank(which may also be formed from strip steel) is welded or otherwisesecured to the edge of the web.

The above and other advantageous steps of the method, and novel detailsthereof, will be.

apparent from the following description of the illustrative sequenceshown in the accompanying drawings, in which: v

Figure 1 is a side elevation of the piece cut from the strip steel toform the web blank Figure 2 is a plan view of a stamping used in Iforming one of the end fittings;

Figure 3 is aside elevation of the fitting;

Figure 4 is an end elevation of the fitting;

Figure 5 is a side elevation of the blankwith the end fittings attached,and pierced atits ends to form openings, at one end for an anchorfitting and at the other end for a transverse pivot carrying a pair ofcam rollers;

Figures 6 and 7 are respectively a side eleva- I tion and a bottom plan.view of the blank after corrugating;

Figure 8 is a section through the blank at this stage, on the line 8-4of Figure 6;

Figure 9 is a side elevation of the blank after bending; Figure 10 isasection. through the bent blank on the line l-llof Figure 9;

Figure 11 is a side elevation of the shoe after the attachment of therim;

tFigure '12 is a section on the line I2-|2 of Figure 11; and

Figure 13 is a bottom plan view of the shoe.

. In making a brake shoe or the like according to my novelmethod, Ipreferably first stamp a straight web blank ID from strip steel of thesame width, forming the blank or element shown in plan in Figure 1.Another blank 12 shown in Figure 2 may be doubled upon itself as shownin'Figures 3 and 4, one of these fittings being spot-welded or otherwisesecured to each end of the blank I 0 as shown in Figure 5. Openings l4and I6 may then be pierced in the ends of the blank, through thefittings [2, to take care respectively'of a pivot mounting having.on itsends 15 a pair of cam rollers (not shown), and an anchor connection (notshown).

The blank is then pressed or stamped to form a series of transverse (i.e. widthwise-extending) parallel corrugations l8, as shown in Figures 6,2o

7, and 8. The block is then bent, in the plane of the original material(i. e. widthwise) to form an arc, as shown in Figures 9 and 10, theouter portions of the corrugations being stretched and flattened, andthe inner portions being compressed and deepened, as will be apparentfrom a comparison of Figures 8 and 10.

A rim 20, cut from a strip of steel and bent into an arc correspondingto the curvature of the web, is now placed against the outer edge of thebent. and corrugated web, and permanently secured thereto by spotwelding or otherwise.

The shoe so formed shownin Figures 11, 12, and 13, is both light andstrong, and the material from which it is made is considerably cheaperthan heretofore used.

While one particular sequence of steps, and a particular structure, havebeen described in derugating the second mentioned strip, deformingthesecond mentioned strip by stretching one edge thereof whilecompressing the other edge to decrease the undulations on one edge andto increase the undulations on the other edge, stamping reinforcingplates, bending the reinforcing plates upon themselves and fitting thereinforcing plates on the ends of the second strip and spot welding thecorrugated strip to the first strip. P

' 1o 2. A method of forming a brake shoe or thelike comprising thesteps'of forming a. strip of metal with transverse corrugations, and bendingthe strip in the plane of the original material to form an arcapproximating halt a circumference in length with radial corrugationswhich are broadest at the outer edge of the strip I and which convergeas they approach the inner edge and welding a rim member directly to oneof the edges of said strip.

ADOLPH ROSNER. 10

